百度试题 结果1 题目What are the numbers of protons,electrons,and neutrons in239Pu?相关知识点: 试题来源: 解析 Protons:94, from the periodic table. Electrons : 94, since the atom is uncharged. Neutrons:239-94=145 反馈 收藏
There are just as many protons in the nucleus as electrons___ around it. A.revolvingB.spinningC.rotatingD.spiraling 相关知识点: 试题来源: 解析 A 题意是:在原子核中的质子数与___ 它们的电子数相同。 [A] revolving“旋转,绕转”,指某一物体沿一定的轨道围绕着另一物体旋转,符合题意。 [B] sp...
The electrons and protons themselves,however,are only crude first approximations,a way of collecting into a bundle either trains of waves or the statistical probabilities of various different kinds of events. 相关知识点: 试题来源: 解析 然而电子和质子仅仅是粗略的一次近似,这是一种将列波或者不同...
百度试题 结果1 题目Protons and neutrons are known as___ A) Electrons B) Neutrinos C) Nucleons D) Quarks 相关知识点: 试题来源: 解析 C 反馈 收藏
百度试题 题目Atoms are made from even smaller particles. They are Protons, Neutrons and Electrons. A.正确B.错误相关知识点: 试题来源: 解析 A 反馈 收藏
Atoms are electrically neutral if they have an equal number of protons and electrons. Atoms that have either a deficit or a surplus of electrons are called ions. Electrons that are farthest from the nucleus may be transferred to othernearby atomsor shared between atoms. By this mechanism, atoms...
If an atom were about as big as a baseball stadium, the nucleus would be the size of a pea in the very center and the electrons would be somewhere on the outside edge.What makes an atom of gold different from an atom of iron is the number of protons, neutrons, and electrons inside...
百度试题 结果1 题目Atoms are made from a nucleus of protons and neutrons and a cloud of electrons. A. 正确 B. 错误 相关知识点: 试题来源: 解析 正确 反馈 收藏
Atomic Particles Atoms are made of protons, neutrons and electrons 99.999999999999% of the atom is empty space Electrons have locations desc
A neutral atom of iron has a mass number of 108 and an atomic number of 47. How many protons, electrons and neutrons are in this atom? How many protons and neutrons are in an atom with an atomic number of 35 and a mass number of 81?